Epithets
| seric- | prefix meaning "silk"  | 
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| serotina | late; in the evening  | 
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| serotinus | late; in the evening  | 
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| serpens | creeping  | 
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| serra | toothed, saw toothed  | 
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| serrata | toothed, saw toothed  | 
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| sessile | stalkless  | 
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| sessilis | stalkless  | 
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| seta- | prefixes meaning "bristley"  | 
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| seti- | prefixes meaning "bristley"  | 
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| seto- | prefixes meaning "bristley"  | 
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| setu- | prefixes meaning "bristley"  | 
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| signata | marked  | 
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| signatus | marked  | 
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| simile | similar  | 
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| similis | similar  | 
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| simplex | simple  | 
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| simulans | imitating  | 
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| sinuata | wavy-edged  | 
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| sinuatus | wavy-edged  | 
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| sobolifera | having offshoots  | 
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| socialis | found in colonies  | 
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| somnifera | sleep inducing  | 
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| spathulata | with small spathe  | 
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| spathulatus | with small spathe  |